Fig. 15

Effect of (1E,4E)-4-(4-nitrobenzylidene)-1-(4-nitrophenyl) oct-1-en-3-one (AK-2a) and tramadol on latency time in hot plate assay. Data expressed as mean ± SEM, n = 5. *P < 0.05, **P < 0.01 and ***P < 0.001 vs. saline group, one way ANOVA with post hoc Tukey’s test